STAAR Science Grade 7 Sample Questions
Q1. A group of organs that work together is
A. A cell
B. A tissue
C. An organ system
D. An organelle
Q2. Which of the following is not a major organ of a plant?
A. Leaf
B. Bark
C. Stem
D. Root
Q3. Which organ system filters wastes from the blood?
A. Excretory
B. Nervous
C. Respiratory
D. Digestive
Q4. How do a birds hollow bones help it fly?
A. They make the birds wings stronger.
B. They make the birds wings longer.
C. They make the birds feathers grow faster.
D. They make the birds lighter.
Q5. Which of the following does an omnivore eat?
A. Producers only
B. Consumers only
C. Producers and consumers
Q6. Heredity is the passing on of
A. Cell nuclei
B. Genetic instructions
C. Proteins
D. Phenotypes
Q7. What role do plants play in the water cycle?
A. They add water vapor to the air.
B. They absorb water vapor from the air.
C. They release oxygen into the air.
D. They release carbon dioxide into the air.
Q8. Which of these energy transformations allows an animal to move its body with its muscles?
A. Mechanical energy to radiant energy
B. Chemical energy to radiant energy
C. Chemical energy to mechanical energy
D. Mechanical energy to radiant energy
Q9. Geotropism is a plants response to
A. Heat
B. Light
C. Gravity
D. Insects
Q10. What is homeostasis?
A. Making body functions stay the same.
B. Keeping the body warm
C. Finding ways to speed up chemical reactions
D. Maintaining a balance in body functions
Correct Answers with Explanation
Answer 1.Correct Answer is C. An organ system. Explanation An organ system is a group of organs that work together to carry out a life function. The human digestive system, for eg, includes the mouth, esophagus, stomach, small intestine, large intestine, and other organs.
Answer 2. Correct Answer is B. Bark. Explanation The major organs of the plants are the roots, stems and leaves. Roots anchor the plant in the ground and absorb water for the plant. Stems hold the leaves up in the light and carry materials between the roots and leaves. Leaves are the main organs for photosynthesis. Many plants also have another organ, the flower. Flowers are used for reproduction.
Answer 3. Correct Answer is A. Excretory. Explanation When cells use nutrients to carry out life processes, they produce wastes. These wastes are released into the blood for transport to the excretory system. The excretory system filters waste products of cells and excess water from the body.
Answer 4. Correct Answer is D. They make the birds lighter. Explanation Birds have hollow bones instead of solid bones. Hollow bones make birds light, which helps them fly.
Answer 5. Correct Answer is C. Producers and consumers. Explanation Omnivores eat both producers and consumers.
Answer 6. Correct Answer is B. Genetic instructions. Explanation Heredity is the passing of genetic instructions from one generation to another. Organisms inherit traits when parents pass their genetic information to their offspring during reproduction.
Answer 7. Correct Answer is A. They add water vapor to the air. Explanation During the process of transpiration, plants release water vapor into the air through their stomata.
Answer 8. Correct Answer is C. Chemical energy to mechanical energy. Explanation Animals muscle change the chemical energy stored in the food into mechanical energy, which allows the animal to move.
Answer 9. Correct Answer is C. Gravity. Explanation Geotropism is a plants response to the downward pull of gravity. The stems and roots of a plant respond to gravity in different ways.
Answer 10. Correct Answer is D. Maintaining a balance in body functions. Explanation All organisms must maintain an internal environment that lets them function properly. The ability to maintain a balanced internal environment is called homeostasis.
For more questions Study Guide and Preparation- State of Texas Assessments of Academic Readiness (STAAR)
| Grade 7 | All Subjects* (printed) (ebook) |
Reading (printed) (ebook) |
Mathematics (printed) (ebook) |
Writing (printed) (ebook) |
*All Subjects Study Guides include each individual subject guide for that grade level.